‘The Idea of You’ dreams up a romance built around very familiar ideas

If “Notting Hill” and “How Stella Got Her Groove Back” had a baby, it would look something like “The Idea of You.”

If “Notting Hill” and “How Stella Got Her Groove Back” had a baby, it would look something like “The Idea of You,” a May-August romantic pairing of Anne Hathaway and Nicholas Galitzine. Nicely played by the leads, this tale of a 40-year-old woman swept off her feet by a 20-something boy-band star amounts to playing the genre’s hits while following all the same old steps. Destined for Amazon, it’s a competent date-night or gals’-night movie for those who don’t want to leave the house – Chardonnay optional, but recommended – which makes practical sense, landing as it does in a middle ground that has struggled at the box office. Cheated on and left by her husband, Soléne (Hathaway) is a successful art-gallery owner who gets roped at the last-minute into squiring her teenage daughter and the kid’s friends to Coachella, where her ex has purchased a meet-and-greet experience with the members of August Moon, whose following might lean more toward the tween crowd. A reluctant attendee, Soléne has the ultimate meet-cute moment with band member Hayes (Galitzine, of “Mary & George” and “Red, White & Royal Blue” renown), stumbling into his trailer thinking it’s the restroom. After some awkward banter and obvious chemistry – which with the benefit of hindsight is about as good as the movie gets – Hayes shows up unexpectedly (by her, that is) at Soléne’s gallery, telling her shyly, “I feel like I don’t meet people like you very often.” For a pop star, he’s an endearingly sensitive soul, which doesn’t do much to quell her reticence, due both to their age gap and his fame.